feat: Add dark mode and album integration

Features:
- Dark mode with system preference detection and manual toggle
- Album integration via IMMICH_ALBUM_NAME environment variable
  - Auto-creates album if it doesn't exist
  - Adds uploaded assets to configured album
  - Shows album name in connection test
- Fixed WebSocket disconnection error

Updates:
- Enhanced UI with dark mode support for all components
- Updated README with new features and screenshot
- Added configuration for album name in docker-compose.yml

docker-compose.yml

@@ -6,6 +6,9 @@ services:
     ports:
       - "8080:8080"
 
+    environment:
+      IMMICH_ALBUM_NAME: dead-drop
+
     env_file:
       - ./.env